US20110064921A1 - Solvent-based ink composition for thermal inkjets comprising acetate solvent - Google Patents
Solvent-based ink composition for thermal inkjets comprising acetate solvent Download PDFInfo
- Publication number
- US20110064921A1 US20110064921A1 US12/557,522 US55752209A US2011064921A1 US 20110064921 A1 US20110064921 A1 US 20110064921A1 US 55752209 A US55752209 A US 55752209A US 2011064921 A1 US2011064921 A1 US 2011064921A1
- Authority
- US
- United States
- Prior art keywords
- ink
- ink composition
- solvent
- acetate
- colorant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 104
- 239000002904 solvent Substances 0.000 title claims abstract description 83
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 title claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000003086 colorant Substances 0.000 claims abstract description 31
- 150000001875 compounds Chemical class 0.000 claims abstract description 21
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 19
- 125000004430 oxygen atom Chemical group O* 0.000 claims abstract description 13
- 239000000049 pigment Substances 0.000 claims description 40
- 239000000758 substrate Substances 0.000 claims description 32
- 229920002554 vinyl polymer Polymers 0.000 claims description 29
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 28
- AOGQPLXWSUTHQB-UHFFFAOYSA-N hexyl acetate Chemical compound CCCCCCOC(C)=O AOGQPLXWSUTHQB-UHFFFAOYSA-N 0.000 claims description 18
- 239000004094 surface-active agent Substances 0.000 claims description 18
- 229920000642 polymer Polymers 0.000 claims description 12
- FPZWZCWUIYYYBU-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl acetate Chemical compound CCOCCOCCOC(C)=O FPZWZCWUIYYYBU-UHFFFAOYSA-N 0.000 claims description 8
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 6
- 229920000058 polyacrylate Polymers 0.000 claims description 6
- CCTFMNIEFHGTDU-UHFFFAOYSA-N 3-methoxypropyl acetate Chemical compound COCCCOC(C)=O CCTFMNIEFHGTDU-UHFFFAOYSA-N 0.000 claims description 5
- 239000002736 nonionic surfactant Substances 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 4
- 239000000976 ink Substances 0.000 description 153
- 235000019441 ethanol Nutrition 0.000 description 30
- 239000000975 dye Substances 0.000 description 24
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 18
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 description 15
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 0 [7*]OC(C)=O Chemical compound [7*]OC(C)=O 0.000 description 14
- 238000000034 method Methods 0.000 description 11
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 10
- 125000000753 cycloalkyl group Chemical group 0.000 description 9
- -1 methoxypropyl Chemical group 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 239000006185 dispersion Substances 0.000 description 7
- 238000007639 printing Methods 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 125000002993 cycloalkylene group Chemical group 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 229910052736 halogen Inorganic materials 0.000 description 5
- 150000002367 halogens Chemical class 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- VATRWWPJWVCZTA-UHFFFAOYSA-N 3-oxo-n-[2-(trifluoromethyl)phenyl]butanamide Chemical compound CC(=O)CC(=O)NC1=CC=CC=C1C(F)(F)F VATRWWPJWVCZTA-UHFFFAOYSA-N 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 4
- 125000004400 (C1-C12) alkyl group Chemical group 0.000 description 3
- 125000004191 (C1-C6) alkoxy group Chemical group 0.000 description 3
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 125000005842 heteroatom Chemical group 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- CUVLMZNMSPJDON-UHFFFAOYSA-N 1-(1-butoxypropan-2-yloxy)propan-2-ol Chemical compound CCCCOCC(C)OCC(C)O CUVLMZNMSPJDON-UHFFFAOYSA-N 0.000 description 2
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical compound CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 description 2
- RRQYJINTUHWNHW-UHFFFAOYSA-N 1-ethoxy-2-(2-ethoxyethoxy)ethane Chemical compound CCOCCOCCOCC RRQYJINTUHWNHW-UHFFFAOYSA-N 0.000 description 2
- CXBDYQVECUFKRK-UHFFFAOYSA-N 1-methoxybutane Chemical compound CCCCOC CXBDYQVECUFKRK-UHFFFAOYSA-N 0.000 description 2
- FENFUOGYJVOCRY-UHFFFAOYSA-N 1-propoxypropan-2-ol Chemical compound CCCOCC(C)O FENFUOGYJVOCRY-UHFFFAOYSA-N 0.000 description 2
- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical compound COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 description 2
- DJCYDDALXPHSHR-UHFFFAOYSA-N 2-(2-propoxyethoxy)ethanol Chemical compound CCCOCCOCCO DJCYDDALXPHSHR-UHFFFAOYSA-N 0.000 description 2
- WAEVWDZKMBQDEJ-UHFFFAOYSA-N 2-[2-(2-methoxypropoxy)propoxy]propan-1-ol Chemical compound COC(C)COC(C)COC(C)CO WAEVWDZKMBQDEJ-UHFFFAOYSA-N 0.000 description 2
- XLLIQLLCWZCATF-UHFFFAOYSA-N 2-methoxyethyl acetate Chemical compound COCCOC(C)=O XLLIQLLCWZCATF-UHFFFAOYSA-N 0.000 description 2
- QCAHUFWKIQLBNB-UHFFFAOYSA-N 3-(3-methoxypropoxy)propan-1-ol Chemical compound COCCCOCCCO QCAHUFWKIQLBNB-UHFFFAOYSA-N 0.000 description 2
- QPQKUYVSJWQSDY-UHFFFAOYSA-N 4-phenyldiazenylaniline Chemical compound C1=CC(N)=CC=C1N=NC1=CC=CC=C1 QPQKUYVSJWQSDY-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- DHXVGJBLRPWPCS-UHFFFAOYSA-N Tetrahydropyran Chemical compound C1CCOCC1 DHXVGJBLRPWPCS-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- BGTOWKSIORTVQH-UHFFFAOYSA-N cyclopentanone Chemical compound O=C1CCCC1 BGTOWKSIORTVQH-UHFFFAOYSA-N 0.000 description 2
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- WTIFIAZWCCBCGE-UUOKFMHZSA-N guanosine 2'-monophosphate Chemical compound C1=2NC(N)=NC(=O)C=2N=CN1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1OP(O)(O)=O WTIFIAZWCCBCGE-UUOKFMHZSA-N 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 238000007641 inkjet printing Methods 0.000 description 2
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- LKKPNUDVOYAOBB-UHFFFAOYSA-N naphthalocyanine Chemical compound N1C(N=C2C3=CC4=CC=CC=C4C=C3C(N=C3C4=CC5=CC=CC=C5C=C4C(=N4)N3)=N2)=C(C=C2C(C=CC=C2)=C2)C2=C1N=C1C2=CC3=CC=CC=C3C=C2C4=N1 LKKPNUDVOYAOBB-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XNLICIUVMPYHGG-UHFFFAOYSA-N pentan-2-one Chemical compound CCCC(C)=O XNLICIUVMPYHGG-UHFFFAOYSA-N 0.000 description 2
- 239000001007 phthalocyanine dye Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 229920001567 vinyl ester resin Polymers 0.000 description 2
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- QQZOPKMRPOGIEB-UHFFFAOYSA-N 2-Oxohexane Chemical compound CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 1
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 229910017083 AlN Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
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- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- DICUPLXUNISGAQ-UHFFFAOYSA-N Isooctyl acetate Chemical compound CC(C)CCCCCOC(C)=O DICUPLXUNISGAQ-UHFFFAOYSA-N 0.000 description 1
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- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- VJMAITQRABEEKP-UHFFFAOYSA-N [6-(phenylmethoxymethyl)-1,4-dioxan-2-yl]methyl acetate Chemical compound O1C(COC(=O)C)COCC1COCC1=CC=CC=C1 VJMAITQRABEEKP-UHFFFAOYSA-N 0.000 description 1
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- 125000005073 adamantyl group Chemical group C12(CC3CC(CC(C1)C3)C2)* 0.000 description 1
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- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- SYSQUGFVNFXIIT-UHFFFAOYSA-N n-[4-(1,3-benzoxazol-2-yl)phenyl]-4-nitrobenzenesulfonamide Chemical class C1=CC([N+](=O)[O-])=CC=C1S(=O)(=O)NC1=CC=C(C=2OC3=CC=CC=C3N=2)C=C1 SYSQUGFVNFXIIT-UHFFFAOYSA-N 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- OBJNZHVOCNPSCS-UHFFFAOYSA-N naphtho[2,3-f]quinazoline Chemical compound C1=NC=C2C3=CC4=CC=CC=C4C=C3C=CC2=N1 OBJNZHVOCNPSCS-UHFFFAOYSA-N 0.000 description 1
- 150000002791 naphthoquinones Chemical class 0.000 description 1
- 239000001005 nitro dye Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001006 nitroso dye Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 125000002255 pentenyl group Chemical group C(=CCCC)* 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 125000005592 polycycloalkyl group Polymers 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229960003351 prussian blue Drugs 0.000 description 1
- 239000013225 prussian blue Substances 0.000 description 1
- DHERNFAJQNHYBM-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1.O=C1CCCN1 DHERNFAJQNHYBM-UHFFFAOYSA-N 0.000 description 1
- FYNROBRQIVCIQF-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole-5,6-dione Chemical compound C1=CN=C2C(=O)C(=O)N=C21 FYNROBRQIVCIQF-UHFFFAOYSA-N 0.000 description 1
- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
- 239000001008 quinone-imine dye Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- RWRDLPDLKQPQOW-UHFFFAOYSA-N tetrahydropyrrole Substances C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- JOUDBUYBGJYFFP-FOCLMDBBSA-N thioindigo Chemical compound S\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2S1 JOUDBUYBGJYFFP-FOCLMDBBSA-N 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
- 239000001018 xanthene dye Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/36—Inkjet printing inks based on non-aqueous solvents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0064—Digital printing on surfaces other than ordinary paper on plastics, horn, rubber, or other organic polymers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
Definitions
- This invention relates to inkjet inks for thermal inkjet printers. It has been developed primarily to enable thermal inkjet printing onto a wide range of substrates, including non-porous substrates.
- Thermal bubble-forming inkjet printheads function by generating a certain amount of heat in the printing fluid contained in a nozzle chamber. This heat causes a bubble to form which eventually collapses as the fluid is forced through a nozzle. The collapse of the bubble then causes more fluid to enter the nozzle chamber for the same process to begin again.
- printers equipped with such thermal inkjet printheads typically use water-based ink formulations.
- piezo printheads offer a wide degree of ink formulation flexibility, since droplet ejection occurs through a piezoelectric force rather than a bubble forming mechanism. Because of this, many different ink chemistries can be used in piezo printheads, such as UV curable, solvent-based, hot-melt and oil-based, as well as water-based.
- the output from the piezo printers is equally diverse, addressing a host of graphics market segments including packaging, wide-format displays, CD and glass decoration. Taking wide-format printing as an example, there are a large number of solvent-based printers on the market all of which use piezo printheads. These print onto a range of media, including low cost non-porous and semi-porous substrates such as uncoated vinyls and polyesters.
- the Applicant has developed a range of bend-actuated printheads, which do not rely on bubble formation for ink ejection and, like piezo printheads, can be used with either aqueous or non-aqueous inks.
- Some of the Applicant's bend-actuated inkjet printheads are described in, for example, U.S. Pat. No. 7,416,280; U.S. Pat. No. 6,902,255; US 2008/0129793; and US 2008/0225082, the contents of which are herein incorporated by reference.
- a solvent-based ink composition for a thermal inkjet printhead comprising:
- R 1 is C 1-6 alkyl
- each of R 2 , R 3 and R 4 is independently selected from H, C 1-6 alkyl, halogen, OH, and C 1-6 alkoxy;
- R 1 is C 1-6 alkyl; and each of R 2 , R 3 and R 4 is H.
- the compound of formula (A) is N-methyl-2-pyrrolidinone or N-ethyl-2-pyrollidinone.
- the C 1-6 alcohol is ethanol.
- the colorant is a dye or a pigment.
- the ink composition comprises 0.001-10 wt. % of a surfactant.
- the surfactant is a nonionic surfactant.
- the surfactant is non-polymeric.
- the composition does not comprise an acrylate polymer or copolymer.
- the composition does not comprise any polymers.
- the ink composition consists essentially of or consists only of the compound of formula (A), the C 1-6 alcohol and the colorant.
- a method of ejecting ink from a thermal inkjet printhead comprising the steps of:
- the ink is a solvent-based ink composition
- a solvent-based ink composition comprising:
- R 1 is C 1-6 alkyl
- the ink is ejected onto a non-porous or a semi-porous substrate.
- the ink adheres to the substrate.
- the substrate is a plastics substrate.
- the heater element is suspended in the ink chamber, such that the ink composition envelops the heater element.
- an actuation energy for the heater element is less than 500 nJ.
- the printhead comprises at least 50,000 nozzles.
- a solvent-based ink composition for a thermal inkjet printhead comprising:
- the compound of formula (B) is cyclohexanone.
- a method of ejecting ink from a thermal inkjet printhead comprising the steps of:
- the ink is a solvent-based ink composition
- a solvent-based ink composition comprising:
- a solvent-based ink composition for a thermal inkjet printhead comprising:
- R 7 is a C 4-8 alkyl group interrupted with 0, 1 or 2 oxygen atoms.
- the compound of formula (C) is selected from the group consisting of: hexyl acetate; carbitol acetate; butyldiglycol acetate; and methoxypropyl acetate.
- a method of ejecting ink from a thermal inkjet printhead comprising the steps of:
- the ink is a solvent-based ink composition
- a solvent-based ink composition comprising:
- a solvent-based ink composition for a thermal inkjet printhead comprising:
- At least one of R 8 and R 9 includes one or more oxygen atom interruptions.
- the compound of formula (D) is selected from the group consisting of: dipropylene glycol monomethyl ether, dipropylene glycol dimethyl ether, diethylene glycol diethyl ether, propylene glycol butyl ether, dipropylene glycol dimethyl ether, dipropylene glycol butyl ether, diethylene glycol monopropyl ether, propylene glycol propyl ether, tetraethylene glycol dimethyl ether, methyl butyl ether, tripropylene glycol methyl ether, tetrahydrofuran, and tetrahydropyran.
- a method of ejecting ink from a thermal inkjet printhead comprising the steps of:
- a printer comprising:
- the thermal inkjet printhead comprises a plurality of nozzles, each of the plurality of nozzles comprising:
- a nozzle chamber containing the ink the nozzle chamber having a nozzle opening for ejection of the ink
- an ink cartridge for a thermal inkjet printhead the ink cartridge containing any one of the solvent-based ink compositions described above.
- the ink cartridge comprises a thermal inkjet printhead integrated therewith.
- a substrate having any one of the ink compositions described above disposed thereon.
- the substrate is a semi-porous or non-porous substrate.
- the substrate is a vinyl substrate.
- FIG. 1 is a perspective view of part of a thermal inkjet printhead
- FIG. 2 is a side view of one of the nozzle assemblies shown in FIG. 1 ;
- FIG. 3 is a perspective of the nozzle assembly shown in FIG. 2 .
- FIG. 4 is perspective view of a thermal inkjet print engine.
- the present invention provides solvent-based ink compositions, which may be jetted from a thermal inkjet printhead of the type that rapidly generates a bubble in each nozzle chamber in order to eject ink.
- the overwhelming preference of the prior art is to eject aqueous ink compositions from thermal inkjet printheads.
- aqueous ink compositions limit the number of applications in which thermal inkjet printheads may be used.
- the present invention which makes use of non-aqueous ink compositions, expands the number of possible applications for thermal inkjet printheads by enabling such printheads to print ink which adheres to non-porous and semi-porous print media.
- the use of thermal inkjet printheads in wide-format and other markets is a realistic possibility using the present invention.
- the ink compositions according to the present invention are characterized by their relative simplicity, especially when compared to their solvent-based counterparts typically used in piezo printheads.
- a typical solvent-based ink composition used in piezo printheads has a solvent system comprised of about five or more different solvents.
- these solvent-based ink compositions usually comprise one or more polymers (e.g. acrylate polymers) to aid dispersion of colorant(s) in the ink. It is an advantage of the present invention that the solvent system comprises only two solvents and does not normally comprise any polymers.
- the ink compositions of the present invention generally comprise three main components, each of which will be discussed in more detail.
- the first component is a solvent, which promotes adhesion of the ink to non-porous surfaces (e.g. vinyl surfaces).
- the second component promotes bubble formation in the thermal printhead.
- the third component is a colorant, which may be either a dye or pigment.
- inks may be formulated using only these three components, a fourth component may additionally be present for improving the film appearance of the ink on non-porous media.
- the first and second components together typically make up at least 70% wt. %, at least 80 wt. % or at least 90 wt. % of the ink composition.
- the amount of the first component (“adhesion-promoting solvent”) is in the range of 20 to 80 wt. %, based on the total weight of the ink composition.
- the amount of first component is in the range of 30 to 60 wt. %, or optionally 40 to 50 wt. %.
- the amount of the second component (“bubble-promoting solvent”) is in the range of 10 to 70 wt. %, based on the total weight of the ink composition.
- the amount of second component is in the range of 30 to 60 wt. %, or optionally 40 to 50 wt. %.
- the ratio of the first and second components may be in the range of 3:1 to 1:3, optionally 2:1 to 1:2 or optionally 1.5:1 to 1:1.5.
- the first and second components are present in approximately equal amounts i.e. about a 1:1 ratio.
- the amount of the third component (“colorant”) is in the range of 0.01 to 25 wt. %, based on the total weight of the ink composition.
- the exact amount of third component will usually depend on whether the colorant is a dye or pigment, as well as the characteristics of the dye or colorant (e.g. optical density) and other printing parameters (e.g. droplet size, dot density etc).
- the amount of third component is in the range of 0.1 to 10 wt. %, or optionally 1 to 5 wt. %.
- the amount of fourth component (“film appearance improver”), when present in the ink composition, is in the range of 0.01 to 10 wt. %.
- the amount of fourth component is in the range of 0.05 to 5 wt. %, or optionally 0.1 to 1 wt. %.
- the ink composition may consist essentially of the first, second and third components.
- the first, second and third components together may comprise at least 90 wt. %, at least 95 wt. %, or least 98 wt. % of the ink composition.
- the ink composition may consist of only the first, second and third components. In other embodiments, the ink composition may consist of only the first, second, third and fourth components.
- the ink composition does not contain any acrylate polymers, which are usually used in solvent-based ink compositions described in the prior art.
- the ink composition may not contain any polymers whatsoever.
- a first type of adhesion-promoting solvent is of formula (A):
- R 1 is C 1-6 alkyl; and each of R 2 , R 3 and R 4 is independently selected from H, C 1-6 alkyl, halogen, OH, and C 1-6 alkoxy.
- Typical examples of a solvent of formula (A) are N-methyl-2-pyrrolidinone (NMP) and N-ethyl-2-pyrollidinone (NEP).
- a second type of adhesion-promoting solvent is of formula (B):
- Typical examples of a solvent of formula (B) are methyl ethyl ketone (MEK), methyl propyl ketone, methyl butyl ketone, cyclohexanone, cyclopentanone, cycloheptanone, cyclooctanone and isophorone.
- MEK methyl ethyl ketone
- propyl ketone methyl propyl ketone
- methyl butyl ketone cyclohexanone
- cyclopentanone cycloheptanone
- cyclooctanone cycloctanone
- a third type of adhesion-promoting solvent is of formula (C):
- Typical examples of a solvent of formula (C) are hexyl acetate, ethyl acetate, butyl acetate, carbitol acetate[2-(2-ethoxyethoxy)ethyl acetate], isooctyl acetate, butyl carbitol acetate[2-(2-butoxyethoxy)ethyl acetate], butyldiglycol acetate[2-(2-butoxyethoxy)ethyl acetate], and methoxypropyl acetate.
- a fourth type of adhesion-promoting solvent is of formula (D):
- Typical examples of a solvent of formula (D) are dipropylene glycol monomethyl ether, dipropylene glycol dimethyl ether, diethylene glycol diethyl ether, propylene glycol butyl ether, dipropylene glycol dimethyl ether, dipropylene glycol butyl ether, diethylene glycol monopropyl ether, propylene glycol propyl ether, tetraethylene glycol dimethyl ether, methyl butyl ether, tripropylene glycol methyl ether, tetrahydrofuran and tetrahydropyran.
- alkyl is used herein to refer to alkyl groups in both straight and branched forms. Unless stated otherwise, the alkyl group may be interrupted with 1, 2 or 3 heteroatoms selected from O, NH or S. For example, an O atom interruption in a C—C bond provides an ether. Alternatively, an O atom interruption in a C—H bond provides an alcohol. Hence, ethers and alcohols are within the ambit of “alkyl” as defined herein.
- alkyl group may also be interrupted with 1, 2 or 3 double and/or triple bonds.
- alkyl usually refers to alkyl groups having no double or triple bond interruptions. Where alkenyl, ether, alkoxy etc. groups are specifically mentioned, this is not intended to be construed as a limitation on the definition of “alkyl” above.
- C 1-6 alkyl it is meant the alkyl group may contain any number of carbon atoms between 1 and 6.
- C 1-6 alkyl may encompass groups, such as methyl, ethyl, propyl (including n-propyl, isopropyl etc), butyl (including n-butyl, t-butyl etc), pentyl, hexyl, butenyl, pentenyl, hexenyl, iso-propenyl, methoxypropyl, ethoxyethyl, methoxymethyl, ethoxybutyl etc.
- alkyl usually refers to acyclic alkyl groups, but it may also include cycloalkyl groups.
- cycloalkyl includes cycloalkyl, polycycloalkyl, and cycloalkenyl groups, as well as combinations of these with linear alkyl groups (e.g. a cycloalkyl group including alkyl substituent(s) attached to the ring).
- the cycloalkyl group may be interrupted with 1, 2 or 3 heteroatoms selected from O, N or S.
- Such cylcoalkyl groups may be in the form of a cycloalkyl ring substituted with, for example, alkoxy group(s) or they may be in the form of a heterocylocalkyl group.
- heterocycloalkyl groups are pyrrolidino, morpholino, piperidino etc.
- cycloalkyl usually refers to cycloalkyl groups having no heteroatom interruptions.
- examples of cycloalkyl groups include cyclopentyl, cyclohexyl, cyclohexenyl, cyclohexylmethyl and adamantyl groups.
- halogen or “halo” is used herein to refer to any of fluorine, chlorine, bromine and iodine. Usually, however, halogen refers to chlorine or fluorine substituents.
- C 1-6 alcohol refers to alcohol compounds having from 1 to 6 carbon atoms and only one hydroxyl group.
- C 1-6 alcohols examples include methanol, ethanol, propanol (e.g. isopropanol), butanol, pentanol and hexanol.
- a preferred C 1-6 alcohol for use as the bubble-forming solvent in the present invention is ethanol.
- the colorant may be a dye or a pigment. It is an advantage of the present invention that the ink composition may comprises either a dye-based colorant or a pigment-based colorant.
- Inkjet colorants will be well-known to the person skilled in the art and the present invention is not limited to any particular type of dye or pigment.
- Pigments suitable for use in the present invention may be inorganic pigments or organic pigments. Examples are carbon black, Cadmium Red, Molybdenum Red, Chrome Yellow, Cadmium Yellow, Titan Yellow, chromium oxide, Viridian, Titan Cobalt Green, Ultramarine Blue, Prussian Blue, Cobalt Blue, diketopyrrolo-pyrrole, anthraquinone, benzimidazolone, anthrapyrimidine, azo pigments, phthalocyanine pigments (including naphthlocyanine pigments), uinacridone pigments, isoindolinone pigments, dioxazine pigments, indanthrene pigments, perylene pigments, perinone pigments, thioindigo pigments, quinophthalone pigments, and metal complex pigments.
- suitable pigments which may be used in the present invention, are Pigment 15:3, Pigment V19, Pigment Y151 and Pigment PK-7.
- Dyes suitable for use in the present invention include include azo dyes, metal complex dyes, naphthol dyes, anthraquinone dyes, indigo dyes, carbonium dyes, quinone-imine dyes, xanthene dyes, cyanine dyes, quinoline dyes, nitro dyes, nitroso dyes, benzoquinone dyes, naphthoquinone dyes, phthalocyanine dyes (including naphthalocyanine dyes), and metal phthalocyanine dyes (including metal naphthalocyanine dyes).
- Suitable dyes which may used in the present invention, are Solvent red 8, Solvent blue 70, Solvent yellow 82 and Solvent black 27.
- the pigments and dyes can be used either individually or as a combination of two or more thereof.
- the average particle size of pigment particles is optionally in the range of 50 to 500 nm.
- a fourth component may be included in the ink compositions of the present invention in order to improve the film appearance of the ink when deposited on a non-porous substrate e.g. vinyl or polyester substrate.
- the film appearance improver is a surfactant contained in the ink composition in an amount of from 0.001 to 10 wt. %.
- the surfactant is contained in an amount of from 0.01 to 5 wt. %, or from 0.05 to 2 wt. %, or from 0.1 to 1 wt. %.
- the surfactant when present, is typically a nonionic surfactant.
- the nonionic surfactant is non-polymeric.
- Surfactants suitable for use in the present invention include fluorosurfactants (e.g. ethoxylated fluorosurfactants).
- fluorosurfactants e.g. ethoxylated fluorosurfactants.
- fluorosurfactants suitable for improving the film appearance of ink compositions according to the present invention are Zonyl® FSO and Zonyl® FSO-100.
- surfactants suitable for improving the film appearance of ink compositions according to the present invention include Tego Wet® 450, Tegoglide® 410, Twin® 400, Tego Wet® 270 and Tegoglide® 482.
- ink compositions according to the present invention advantageously provide excellent print quality and jettability in the absence of polymer additives (especially acrylate polymers), certain polymers may improve the film appearance of the ink when printed.
- vinyl polymers may improve the film appearance of the ink when printed on vinyl substrates.
- An example of a vinyl polymer additive is a high molecular weight copolymer of vinyl chloride and vinyl acetate (e.g. UCARTM VYHH).
- Such polymer additives may be included in an amount of from 0.01 to 5 wt. %, or from 0.05 to 2 wt. %, or from 0.1 to 1 wt. %.
- the solvent-based ink compositions according to the present invention are designed to be used with thermal inkjet printheads. There now follows a brief description of one of the Applicant's thermal inkjet printheads, as described in U.S. Pat. No. 7,303,930, the contents of which is herein incorporated by reference.
- FIG. 1 there is shown part of printhead comprising a plurality of nozzle assemblies.
- FIGS. 2 and 3 show one of these nozzle assemblies in side-section and cutaway perspective views.
- Each nozzle assembly comprises a nozzle chamber 24 formed by MEMS fabrication techniques on a silicon wafer substrate 2 .
- the nozzle chamber 24 is defined by a roof 21 and sidewalls 22 which extend from the roof 21 to the silicon substrate 2 .
- each roof is defined by part of a nozzle plate 56 , which spans across an ejection face of the printhead.
- the nozzle plate 56 and sidewalls 22 are formed of the same material, which is deposited by PECVD over a sacrificial scaffold of photoresist during MEMS fabrication.
- the nozzle plate 56 and sidewalls 21 are formed of a ceramic material, such as silicon dioxide or silicon nitride. These hard materials have excellent properties for printhead robustness, and their inherently hydrophilic nature is advantageous for supplying ink to the nozzle chambers 24 by capillary action.
- a nozzle opening 26 is defined in a roof of each nozzle chamber 24 .
- Each nozzle opening 26 is generally elliptical and has an associated nozzle rim 25 .
- the nozzle rim 25 assists with drop directionality during printing as well as reducing, at least to some extent, ink flooding from the nozzle opening 26 .
- the actuator for ejecting ink from the nozzle chamber 24 is a heater element 29 positioned beneath the nozzle opening 26 and suspended across a pit 8 . Current is supplied to the heater element 29 via electrodes 9 connected to drive circuitry in underlying CMOS layers of the substrate 2 .
- the heater element 29 When a current is passed through the heater element 29 , it rapidly superheats surrounding ink to form a gas bubble, which forces ink through the nozzle opening 26 . By suspending the heater element 29 , it is completely immersed in ink when the nozzle chamber 24 is primed. This improves printhead efficiency, because less heat dissipates into the underlying substrate 2 and more input energy is used to generate a bubble.
- the nozzles are arranged in rows and an ink supply channel 27 extending longitudinally along the row supplies ink to each nozzle in the row.
- the ink supply channel 27 delivers ink to an ink inlet passage 15 for each nozzle, which supplies ink from the side of the nozzle opening 26 via an ink conduit 23 in the nozzle chamber 24 .
- thermal bubble-forming inkjet printheads having embedded heater elements are described in, for example, U.S. Pat. No. 7,246,876 and US 2006/0250453, the contents of which are herein incorporated by reference.
- the Applicant's thermal inkjet printheads may be generally characterized by having one or more of the following features: (i) suspended heater element; (ii) heater element having a mass of less than 1 nanogram, optionally less than 500 picograms; (iii) actuation energy of less than 500 nJ, optionally less than 200 nJ; and (iv) titanium nitride or titanium aluminium nitride heater element.
- the solvent-based ink compositions of the present invention work optimally in combination with the Applicant's thermal inkjet printheads, as described above. However, their use is not limited to the Applicant's thermal printheads.
- the solvent-based ink compositions described herein may also be used in conventional thermal bubble-forming inkjet printheads, such as those sold commercially by Hewlett-Packard and Canon.
- the present invention may relate to an ink cartridge for a inkjet printer comprising any of the solvent-based ink compositions described above.
- the ink cartridge may optionally comprise a thermal inkjet printhead integrated with therewith.
- printers incorporating the Applicant's thermal inkjet printheads are described in, for example, U.S. Pat. No. 7,201,468; U.S. Pat. No. 7,360,861; U.S. Pat. No. 7,380,910; and U.S. Pat. No. 7,357,496, the contents of each of which are herein incorporated by reference.
- FIG. 4 shows a print engine 103 for a thermal inkjet printer, as described in Applicant's U.S. application Ser. No. 12/062,514, the contents of which is herein incorporated by reference.
- the print engine 103 includes a removable print cartridge 102 , comprising a pagewidth printhead, and a bank of user-replaceable ink cartridges 128 .
- Each color channel typically has its own ink reservoir 128 and a corresponding pressure-regulating chamber 106 for regulation of a hydrostatic pressure of ink supplied to the printhead.
- the print engine 103 has five ink reservoirs 128 and five corresponding pressure-regulating chambers 106 .
- Typical color channel configurations for this five-channel print engine 103 are CMYKK or CMYK(IR).
- Each ink cartridge 128 may comprise a solvent-based ink composition as described herein. Accordingly, the printer is suitable for printing onto non-porous (e.g. vinyl) substrates.
- ink compositions according to the present invention were designed for use in thermal inkjet printheads, they may also be useful in other types of inkjet printhead, such as the Applicant's bend-actuated inkjet printheads described in, for example, U.S. Pat. No. 7,416,280; U.S. Pat. No. 6,902,255; US 2008/0129793; and US 2008/0225082, the contents of which are herein incorporated by reference.
- an “open pool boiler” test apparatus Using an “open pool boiler” test apparatus, and after evaluating a wide range of solvents, the solvents described in Table A were shown to generate bubbles in a thermal inkjet device. (An “open pool boiler” test apparatus essentially comprises one or more inkjet nozzles as shown in FIG. 2 without the roof structure 21 ).
- a preferred solvent combination providing excellent bubble formation was N-methyl-2-pyrrolidine (NMP) and ethanol in a 1:1 ratio.
- ink compositions were formulated consisting of a single solvent (from Table A) and a dye.
- Each ink composition consisted of: 97 wt. % solvent and 3 wt. % Bricosol red K10B (Solvent Red 8).
- the inks were applied as 6 micron wet films to the vinyl surface. Water rubs, adhesion and appearance were noted. In general, all ink compositions had a good film appearance on the vinyl surface before testing, with the exception of the carbitol acetate and hexylacetate compositions, which exhibited some minor irregularities.
- Adhesion tests were made by using a razor blade to mark six vertical lines crossed by six horizontal lines in a grid (cross hatch). Scotch® tape was then placed over the grid and removed rapidly. The damage (if any) to the film was noted and a given an adhesion rating: 0 (poor)-5 (excellent). All ink compositions had an adhesion rating of 5.
- an ink composition comprising NMP and ethanol in a 1:1 ratio was considered to be an excellent composition for thermal inkjets.
- all ink compositions comprising an adhesion-promoting solvent and ethanol were considered to be suitable for ejection using a thermal inkjet device and, indeed, showed good drop ejection characteristics from such a device.
- Each ink composition was placed in a suitable ink reservoir and printed onto vinyl using a thermal inkjet printhead of the type described above, having suspended beam heater elements. All printouts had excellent film appearance, water resistance and adhesion to the vinyl surface.
- surfactant improved the film appearance of the ink on vinyl, compared to ink compositions in which the surfactant was absent.
- surfactants shown to have a beneficial effect in improving the film appearance of printouts on vinyl were Tego Wet® 450, Tegoglide® 410, Twin® 400, Tego Wet® 270 and Tegoglide® 482.
- incorporation of a vinyl polymer into the ink composition showed some improvement in the film appearance of printouts.
- UCARTM VYHH a high molecular weight copolymer of vinyl chloride and vinyl acetate
- polymer additives were not considered to be essential for acceptable film appearance on vinyl print media.
- a CMYK set of inks was prepared using pigment dispersions combined with hexyl acetate solvent.
- the ink compositions are described in Table D.
- jettable ink compositions could be prepared using ink compositions according to the present invention and comprising pigment-based colorants.
Abstract
Description
- This invention relates to inkjet inks for thermal inkjet printers. It has been developed primarily to enable thermal inkjet printing onto a wide range of substrates, including non-porous substrates.
- The following applications have been filed by the Applicant simultaneously with the present application:
-
- INK001US INK002US INK003US INK004US INK006US INK007US INK008US
- The disclosures of these co-pending applications are incorporated herein by reference. The above applications have been identified by their filing docket number, which will be substituted with the corresponding application number, once assigned.
- The following patents or patent applications filed by the applicant or assignee of the present invention are hereby incorporated by cross-reference.
-
6,755,509 7,222,943 7,188,419 7,168,166 7,086,719 12/246,332 12/246,336 7,246,886 7,128,400 7,108,355 6,991,322 7,287,836 7,118,197 10/728,784 7,364,269 7,077,493 6,962,402 10/728,803 7,147,308 10/728,779 7,118,198 7,168,790 7,172,270 7,229,155 6,830,318 7,195,342 7,175,261 7,465,035 7,108,356 7,118,202 10/773,186 7,134,744 7,134,743 7,182,439 7,210,768 7,465,036 7,134,745 7,156,484 7,118,201 7,111,926 7,431,433 7,401,901 7,468,139 11/744,885 11/097,308 7,328,978 7,334,876 7,147,306 7,448,734 7,425,050 11/014,764 11/014,763 7,331,663 7,360,861 7,328,973 7,427,121 7,407,262 7,303,252 7,249,822 11/014,762 7,311,382 7,360,860 7,364,257 7,390,075 7,350,896 7,429,096 7,384,135 7,331,660 7,416,287 11/014,737 7,322,684 7,322,685 7,311,381 7,270,405 7,303,268 7,470,007 7,399,072 7,393,076 11/014,750 11/014,749 7,249,833 11/014,769 11/014,729 7,331,661 11/014,733 7,300,140 7,357,492 7,357,493 11/014,766 7,380,902 7,284,816 7,284,845 7,255,430 7,390,080 7,328,984 7,350,913 7,322,671 7,380,910 7,431,424 7,470,006 11/014,732 7,347,534 7,441,865 7,469,989 7,367,650 7,469,990 11/688,863 11/688,864 11/688,865 7,364,265 11/741,766 12/014,767 12/014,768 12/014,769 12/014,770 12/014,771 12/014,772 12/049,371 12/049,372 12/049,373 12/146,399 12/334,519 12/339,039 - Thermal bubble-forming inkjet printheads function by generating a certain amount of heat in the printing fluid contained in a nozzle chamber. This heat causes a bubble to form which eventually collapses as the fluid is forced through a nozzle. The collapse of the bubble then causes more fluid to enter the nozzle chamber for the same process to begin again.
- Due to the ability of water to form rapidly a bubble at elevated temperature, printers equipped with such thermal inkjet printheads typically use water-based ink formulations.
- However, although it is possible to print directly onto specially treated non-porous and semi-porous substrates, water-based inkjet inks are essentially limited to applications that use porous media, such as office papers and textiles. Accordingly, most printers that use thermal inkjet printheads are usually for the SOHO (small office home office) market.
- In contrast, piezo printheads offer a wide degree of ink formulation flexibility, since droplet ejection occurs through a piezoelectric force rather than a bubble forming mechanism. Because of this, many different ink chemistries can be used in piezo printheads, such as UV curable, solvent-based, hot-melt and oil-based, as well as water-based. The output from the piezo printers is equally diverse, addressing a host of graphics market segments including packaging, wide-format displays, CD and glass decoration. Taking wide-format printing as an example, there are a large number of solvent-based printers on the market all of which use piezo printheads. These print onto a range of media, including low cost non-porous and semi-porous substrates such as uncoated vinyls and polyesters.
- The Applicant has developed a range of bend-actuated printheads, which do not rely on bubble formation for ink ejection and, like piezo printheads, can be used with either aqueous or non-aqueous inks. Some of the Applicant's bend-actuated inkjet printheads are described in, for example, U.S. Pat. No. 7,416,280; U.S. Pat. No. 6,902,255; US 2008/0129793; and US 2008/0225082, the contents of which are herein incorporated by reference.
- The present Applicant has also developed a range of thermal bubble-forming printheads, as described in, for example, U.S. Pat. No. 6,755,509; U.S. Pat. No. 7,246,886; and U.S. Pat. No. 7,401,910, the contents of which are incorporated herein by reference.
- The Applicant's thermal bubble-forming inkjet printers currently offer high-resolution and high-speed printing (e.g. 60 pages per minute at 1600 dpi) of aqueous-based inks for SOHO markets. These aqueous-based inks are suitable for printing onto porous and semi-porous media. However, it would be desirable to provide thermal bubble-forming inkjet printheads, which can print ink onto a wider range of substrates, including non-porous media. This would allow thermal inkjet printheads to compete fully with piezo printers, offering high-resolution and high-speed inkjet printing for a wide range of print media.
- In a first aspect, there is provided a solvent-based ink composition for a thermal inkjet printhead, the ink composition comprising:
-
- (a) 20-80 wt. % of a compound of formula (A);
- wherein:
- R1 is C1-6 alkyl; and
- each of R2, R3 and R4 is independently selected from H, C1-6 alkyl, halogen, OH, and C1-6 alkoxy;
-
- (b) 10-70 wt. % of a C1-6 alcohol;
- (c) 0.01-25 wt. % of a colorant.
- Optionally, R1 is C1-6 alkyl; and each of R2, R3 and R4 is H.
- Optionally, the compound of formula (A) is N-methyl-2-pyrrolidinone or N-ethyl-2-pyrollidinone.
- Optionally, in all relevant aspects of the present invention, the C1-6 alcohol is ethanol.
- Optionally, in all relevant aspects of the present invention, the colorant is a dye or a pigment.
- Optionally, in all relevant aspects of the present invention, the ink composition comprises 0.001-10 wt. % of a surfactant.
- Optionally, in all relevant aspects of the present invention, the surfactant is a nonionic surfactant.
- Optionally, in all relevant aspects of the present invention, the surfactant is non-polymeric.
- Optionally, in all relevant aspects of the present invention, the composition does not comprise an acrylate polymer or copolymer.
- Optionally, in all relevant aspects of the present invention, the composition does not comprise any polymers.
- Optionally, the ink composition consists essentially of or consists only of the compound of formula (A), the C1-6 alcohol and the colorant.
- Optionally, the ink composition consists only of the compound of formula (A), the C1-6 alcohol, the colorant and 0.01-10 wt. % of a surfactant.
- In a second aspect, there is provided a method of ejecting ink from a thermal inkjet printhead, the method comprising the steps of:
- (i) supplying an ink to at least one nozzle chamber of the printhead; and
- (ii) actuating a heater element in the nozzle chamber and heating the ink to a temperature sufficient to form a bubble therein, thereby causing the ink to be ejected from a nozzle opening associated with the nozzle chamber,
- wherein the ink is a solvent-based ink composition comprising:
-
- (a) 20-80 wt. % of a compound of formula (A);
- wherein:
- R1 is C1-6 alkyl; and
- each of R2, R3 and R4 is independently selected from H, C1-6 alkyl, halogen, OH, and C1-6 alkoxy;
-
- (b) 10-70 wt. % of a C1-6 alcohol;
- (c) 0.01-25 wt. % of a colorant.
- Optionally, in all relevant aspects of the present invention, the ink is ejected onto a non-porous or a semi-porous substrate.
- Optionally, in all relevant aspects of the present invention, the ink adheres to the substrate.
- Optionally, in all relevant aspects of the present invention, the substrate is a plastics substrate.
- Optionally, in all relevant aspects of the present invention, the substrate is comprised of untreated vinyl or polyester.
- Optionally, in all relevant aspects of the present invention, the heater element has a mass of less than 1 nanogram.
- Optionally, in all relevant aspects of the present invention, the heater element is suspended in the ink chamber, such that the ink composition envelops the heater element.
- Optionally, in all relevant aspects of the present invention, an actuation energy for the heater element is less than 500 nJ.
- Optionally, in all relevant aspects of the present invention, the printhead is a stationary pagewidth printhead.
- Optionally, in all relevant aspects of the present invention, the printhead comprises at least 50,000 nozzles.
- In a third aspect, there is provided a solvent-based ink composition for a thermal inkjet printhead, the ink composition comprising:
-
- (a) 20-80 wt. % of a compound of formula (B);
- wherein:
-
- R5 is a C1-6 alkyl group and R6 is a C1-6 alkyl group; or
- R5 and R6 are together joined to form a C3-12 cycloalkylene group;
- (b) 10-70 wt. % of a C1-6 alcohol;
- (c) 0.01-25 wt. % of a colorant.
- Optionally, the compound of formula (B) is methylethylketone.
- Optionally, the compound of formula (B) is cyclohexanone.
- In a fourth aspect, there is provided a method of ejecting ink from a thermal inkjet printhead, the method comprising the steps of:
- (i) supplying an ink to at least one nozzle chamber of the printhead; and
- (ii) actuating a heater element in the nozzle chamber and heating the ink to a temperature sufficient to form a bubble therein, thereby causing the ink to be ejected from a nozzle opening associated with the nozzle chamber,
- wherein the ink is a solvent-based ink composition comprising:
-
- (a) 20-80 wt. % of a compound of formula (B);
- wherein:
-
- R5 is a C1-6 alkyl group and R6 is a C1-6 alkyl group; or
- R5 and R6 are together joined to form a C3-12 cycloalkylene group;
- (b) 10-70 wt. % of a C1-6 alcohol;
- (c) 0.01-25 wt. % of a colorant.
- In a fifth aspect, there is provided a solvent-based ink composition for a thermal inkjet printhead, the ink composition comprising:
-
- (a) 20-80 wt. % of a compound of formula (C);
- wherein:
-
- R7 is a C2-12 alkyl group interrupted with 0, 1, 2 or 3 oxygen atoms;
- (b) 10-70 wt. % of a C1-6 alcohol;
- (c) 0.01-25 wt. % of a colorant.
- Optionally, R7 is a C4-8 alkyl group interrupted with 0, 1 or 2 oxygen atoms.
- Optionally, the compound of formula (C) is selected from the group consisting of: hexyl acetate; carbitol acetate; butyldiglycol acetate; and methoxypropyl acetate.
- In a sixth aspect, there is provided a method of ejecting ink from a thermal inkjet printhead, the method comprising the steps of:
- (i) supplying an ink to at least one nozzle chamber of the printhead; and
- (ii) actuating a heater element in the nozzle chamber and heating the ink to a temperature sufficient to form a bubble therein, thereby causing the ink to be ejected from a nozzle opening associated with the nozzle chamber,
- wherein the ink is a solvent-based ink composition comprising:
-
- (a) 20-80 wt. % of a compound of formula (C);
- wherein:
-
- R7 is a C2-12 alkyl group interrupted with 0, 1, 2 or 3 oxygen atoms;
- (b) 10-70 wt. % of a C1-6 alcohol;
- (c) 0.01-25 wt. % of a colorant.
- In a seventh aspect, there is provided a solvent-based ink composition for a thermal inkjet printhead, the ink composition comprising:
-
- (a) 20-80 wt. % of a compound of formula (D);
- wherein:
-
- each of R8 and R9 is independently selected from a C1-12 alkyl group interrupted with 0, 1, 2 or 3 oxygen atoms; or
- R8 and R9 are together joined to form a C3-12 cycloalkylene group;
- (b) 10-70 wt. % of a C1-6 alcohol;
- (c) 0.01-25 wt. % of a colorant.
- Optionally, at least one of R8 and R9 includes one or more oxygen atom interruptions.
- Optionally, the compound of formula (D) is selected from the group consisting of: dipropylene glycol monomethyl ether, dipropylene glycol dimethyl ether, diethylene glycol diethyl ether, propylene glycol butyl ether, dipropylene glycol dimethyl ether, dipropylene glycol butyl ether, diethylene glycol monopropyl ether, propylene glycol propyl ether, tetraethylene glycol dimethyl ether, methyl butyl ether, tripropylene glycol methyl ether, tetrahydrofuran, and tetrahydropyran.
- In an eighth aspect, there is provided a method of ejecting ink from a thermal inkjet printhead, the method comprising the steps of:
- (i) supplying an ink to at least one nozzle chamber of the printhead; and
- (ii) actuating a heater element in the nozzle chamber and heating the ink to a temperature sufficient to form a bubble therein, thereby causing the ink to be ejected from a nozzle opening associated with the nozzle chamber,
- wherein the ink is a solvent-based ink composition comprising:
-
- (a) 20-80 wt. % of a compound of formula (D);
- wherein:
-
- each of R8 and R9 is independently selected from a C1-12 alkyl group interrupted with 0, 1, 2 or 3 oxygen atoms; or
- R8 and R9 are together joined to form a C3-12 cycloalkylene group;
- (b) 10-70 wt. % of a C1-6 alcohol;
- (c) 0.01-25 wt. % of a colorant.
- In a further aspect, there is provided a printer comprising:
-
- an ink reservoir containing a respective ink; and
- a thermal inkjet printhead in fluid communication with the ink reservoir,
wherein the ink is any one of the solvent-based ink compositions described above.
- Optionally, the thermal inkjet printhead comprises a plurality of nozzles, each of the plurality of nozzles comprising:
- a nozzle chamber containing the ink, the nozzle chamber having a nozzle opening for ejection of the ink; and
- a heater element in contact with the ink, the heater element being configured for heating the ink to a temperature sufficient to form a bubble therein and thereby cause ejection of the ink from the nozzle opening.
- In a further aspect, there is provided an ink cartridge for a thermal inkjet printhead, the ink cartridge containing any one of the solvent-based ink compositions described above.
- Optionally, the ink cartridge comprises a thermal inkjet printhead integrated therewith.
- In a further aspect, there is provided a substrate having any one of the ink compositions described above disposed thereon.
- Optionally, the substrate is a semi-porous or non-porous substrate.
- Optionally, the substrate is a vinyl substrate.
- Optional embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:
-
FIG. 1 is a perspective view of part of a thermal inkjet printhead; -
FIG. 2 is a side view of one of the nozzle assemblies shown inFIG. 1 ; and -
FIG. 3 is a perspective of the nozzle assembly shown inFIG. 2 . -
FIG. 4 is perspective view of a thermal inkjet print engine. - The present invention provides solvent-based ink compositions, which may be jetted from a thermal inkjet printhead of the type that rapidly generates a bubble in each nozzle chamber in order to eject ink. The overwhelming preference of the prior art is to eject aqueous ink compositions from thermal inkjet printheads. However, as foreshadowed above, aqueous ink compositions limit the number of applications in which thermal inkjet printheads may be used. The present invention, which makes use of non-aqueous ink compositions, expands the number of possible applications for thermal inkjet printheads by enabling such printheads to print ink which adheres to non-porous and semi-porous print media. Hence, the use of thermal inkjet printheads in wide-format and other markets is a realistic possibility using the present invention.
- The ink compositions according to the present invention are characterized by their relative simplicity, especially when compared to their solvent-based counterparts typically used in piezo printheads. A typical solvent-based ink composition used in piezo printheads has a solvent system comprised of about five or more different solvents. Moreover, these solvent-based ink compositions usually comprise one or more polymers (e.g. acrylate polymers) to aid dispersion of colorant(s) in the ink. It is an advantage of the present invention that the solvent system comprises only two solvents and does not normally comprise any polymers.
- The absence of polymers not only reduces cost, but also minimizes the propensity for non-volatile residues to build up on the thermal heater elements in the printheads (otherwise known as “kogation”). It is surprising that relatively simple solvent-based ink compositions can jet effectively and adhere to non-porous substrates in the absence of polymers and, in particular, acrylate polymers.
- The ink compositions of the present invention generally comprise three main components, each of which will be discussed in more detail. The first component is a solvent, which promotes adhesion of the ink to non-porous surfaces (e.g. vinyl surfaces). The second component promotes bubble formation in the thermal printhead. The third component is a colorant, which may be either a dye or pigment.
- Although inks may be formulated using only these three components, a fourth component may additionally be present for improving the film appearance of the ink on non-porous media.
- The first and second components together typically make up at least 70% wt. %, at least 80 wt. % or at least 90 wt. % of the ink composition.
- The amount of the first component (“adhesion-promoting solvent”) is in the range of 20 to 80 wt. %, based on the total weight of the ink composition. Optionally, the amount of first component is in the range of 30 to 60 wt. %, or optionally 40 to 50 wt. %.
- The amount of the second component (“bubble-promoting solvent”) is in the range of 10 to 70 wt. %, based on the total weight of the ink composition. Optionally, the amount of second component is in the range of 30 to 60 wt. %, or optionally 40 to 50 wt. %.
- The ratio of the first and second components may be in the range of 3:1 to 1:3, optionally 2:1 to 1:2 or optionally 1.5:1 to 1:1.5. In a preferred ink composition, the first and second components are present in approximately equal amounts i.e. about a 1:1 ratio.
- The amount of the third component (“colorant”) is in the range of 0.01 to 25 wt. %, based on the total weight of the ink composition. The exact amount of third component will usually depend on whether the colorant is a dye or pigment, as well as the characteristics of the dye or colorant (e.g. optical density) and other printing parameters (e.g. droplet size, dot density etc). Optionally, the amount of third component is in the range of 0.1 to 10 wt. %, or optionally 1 to 5 wt. %.
- The amount of fourth component (“film appearance improver”), when present in the ink composition, is in the range of 0.01 to 10 wt. %. Optionally, the amount of fourth component is in the range of 0.05 to 5 wt. %, or optionally 0.1 to 1 wt. %.
- The ink composition may consist essentially of the first, second and third components. In other words, the first, second and third components together may comprise at least 90 wt. %, at least 95 wt. %, or least 98 wt. % of the ink composition.
- In some embodiments, the ink composition may consist of only the first, second and third components. In other embodiments, the ink composition may consist of only the first, second, third and fourth components.
- Typically, the ink composition does not contain any acrylate polymers, which are usually used in solvent-based ink compositions described in the prior art. Alternatively, the ink composition may not contain any polymers whatsoever.
- The Applicant has observed that certain types of solvent interact strongly with non-porous substrates, whilst also being jettable from a thermal inkjet printhead. In particular, some solvents adhere strongly with a vinyl print media and leave a film impression, which cannot be easily removed. By contrast, water and ethanol do not leave any impression on vinyl surfaces.
- A first type of adhesion-promoting solvent is of formula (A):
- wherein:
R1 is C1-6 alkyl; and
each of R2, R3 and R4 is independently selected from H, C1-6 alkyl, halogen, OH, and C1-6alkoxy. - Typical examples of a solvent of formula (A) are N-methyl-2-pyrrolidinone (NMP) and N-ethyl-2-pyrollidinone (NEP).
- A second type of adhesion-promoting solvent is of formula (B):
- wherein:
-
- R5 is a C1-6 alkyl group and R6 is a C1-6 alkyl group; or
- R5 and R6 are together joined to form a C3-12 cycloalkylene group;
- Typical examples of a solvent of formula (B) are methyl ethyl ketone (MEK), methyl propyl ketone, methyl butyl ketone, cyclohexanone, cyclopentanone, cycloheptanone, cyclooctanone and isophorone.
- A third type of adhesion-promoting solvent is of formula (C):
- wherein:
-
- R7 is a C2-12 alkyl group interrupted with 0, 1, 2 or 3 oxygen atoms.
- Typical examples of a solvent of formula (C) are hexyl acetate, ethyl acetate, butyl acetate, carbitol acetate[2-(2-ethoxyethoxy)ethyl acetate], isooctyl acetate, butyl carbitol acetate[2-(2-butoxyethoxy)ethyl acetate], butyldiglycol acetate[2-(2-butoxyethoxy)ethyl acetate], and methoxypropyl acetate.
- A fourth type of adhesion-promoting solvent is of formula (D):
- wherein:
-
- each of R8 and R9 is independently selected from a C1-12 alkyl group interrupted with 0, 1, 2 or 3 oxygen atoms; or
- R8 and R9 are together joined to form a C3-12 cycloalkylene group.
- Typical examples of a solvent of formula (D) are dipropylene glycol monomethyl ether, dipropylene glycol dimethyl ether, diethylene glycol diethyl ether, propylene glycol butyl ether, dipropylene glycol dimethyl ether, dipropylene glycol butyl ether, diethylene glycol monopropyl ether, propylene glycol propyl ether, tetraethylene glycol dimethyl ether, methyl butyl ether, tripropylene glycol methyl ether, tetrahydrofuran and tetrahydropyran.
- The term “alkyl” is used herein to refer to alkyl groups in both straight and branched forms. Unless stated otherwise, the alkyl group may be interrupted with 1, 2 or 3 heteroatoms selected from O, NH or S. For example, an O atom interruption in a C—C bond provides an ether. Alternatively, an O atom interruption in a C—H bond provides an alcohol. Hence, ethers and alcohols are within the ambit of “alkyl” as defined herein.
- Unless stated otherwise, the alkyl group may also be interrupted with 1, 2 or 3 double and/or triple bonds. However, the term “alkyl” usually refers to alkyl groups having no double or triple bond interruptions. Where alkenyl, ether, alkoxy etc. groups are specifically mentioned, this is not intended to be construed as a limitation on the definition of “alkyl” above.
- Where reference is made to, for example, C1-6 alkyl, it is meant the alkyl group may contain any number of carbon atoms between 1 and 6. By way of example, C1-6 alkyl may encompass groups, such as methyl, ethyl, propyl (including n-propyl, isopropyl etc), butyl (including n-butyl, t-butyl etc), pentyl, hexyl, butenyl, pentenyl, hexenyl, iso-propenyl, methoxypropyl, ethoxyethyl, methoxymethyl, ethoxybutyl etc.
- The term “alkyl” usually refers to acyclic alkyl groups, but it may also include cycloalkyl groups.
- As used herein, the term “cycloalkyl” includes cycloalkyl, polycycloalkyl, and cycloalkenyl groups, as well as combinations of these with linear alkyl groups (e.g. a cycloalkyl group including alkyl substituent(s) attached to the ring). The cycloalkyl group may be interrupted with 1, 2 or 3 heteroatoms selected from O, N or S. Such cylcoalkyl groups may be in the form of a cycloalkyl ring substituted with, for example, alkoxy group(s) or they may be in the form of a heterocylocalkyl group. Examples of heterocycloalkyl groups are pyrrolidino, morpholino, piperidino etc. However, the term “cycloalkyl” usually refers to cycloalkyl groups having no heteroatom interruptions. Examples of cycloalkyl groups include cyclopentyl, cyclohexyl, cyclohexenyl, cyclohexylmethyl and adamantyl groups.
- The term “halogen” or “halo” is used herein to refer to any of fluorine, chlorine, bromine and iodine. Usually, however, halogen refers to chlorine or fluorine substituents.
- Although the adhesion-promoting solvents described above have an inherent bubble-forming characteristic (as well as good adhesion of vinyl substrates), the ability of these solvents to form bubbles in a thermal inkjet device is improved markedly by the addition of a C1-6 alcohol. For the avoidance of doubt, the term “C1-6 alcohol” as used herein refers to alcohol compounds having from 1 to 6 carbon atoms and only one hydroxyl group.
- Examples of suitable C1-6 alcohols are methanol, ethanol, propanol (e.g. isopropanol), butanol, pentanol and hexanol. A preferred C1-6 alcohol for use as the bubble-forming solvent in the present invention is ethanol.
- As mentioned herein, the colorant may be a dye or a pigment. It is an advantage of the present invention that the ink composition may comprises either a dye-based colorant or a pigment-based colorant.
- Inkjet colorants will be well-known to the person skilled in the art and the present invention is not limited to any particular type of dye or pigment.
- Pigments suitable for use in the present invention may be inorganic pigments or organic pigments. Examples are carbon black, Cadmium Red, Molybdenum Red, Chrome Yellow, Cadmium Yellow, Titan Yellow, chromium oxide, Viridian, Titan Cobalt Green, Ultramarine Blue, Prussian Blue, Cobalt Blue, diketopyrrolo-pyrrole, anthraquinone, benzimidazolone, anthrapyrimidine, azo pigments, phthalocyanine pigments (including naphthlocyanine pigments), uinacridone pigments, isoindolinone pigments, dioxazine pigments, indanthrene pigments, perylene pigments, perinone pigments, thioindigo pigments, quinophthalone pigments, and metal complex pigments. Some specific examples of suitable pigments, which may be used in the present invention, are Pigment 15:3, Pigment V19, Pigment Y151 and Pigment PK-7.
- Dyes suitable for use in the present invention include include azo dyes, metal complex dyes, naphthol dyes, anthraquinone dyes, indigo dyes, carbonium dyes, quinone-imine dyes, xanthene dyes, cyanine dyes, quinoline dyes, nitro dyes, nitroso dyes, benzoquinone dyes, naphthoquinone dyes, phthalocyanine dyes (including naphthalocyanine dyes), and metal phthalocyanine dyes (including metal naphthalocyanine dyes).
- Some specific examples of suitable dyes, which may used in the present invention, are Solvent red 8, Solvent blue 70, Solvent yellow 82 and Solvent black 27.
- The pigments and dyes can be used either individually or as a combination of two or more thereof.
- The average particle size of pigment particles is optionally in the range of 50 to 500 nm.
- A fourth component may be included in the ink compositions of the present invention in order to improve the film appearance of the ink when deposited on a non-porous substrate e.g. vinyl or polyester substrate.
- Usually, the film appearance improver is a surfactant contained in the ink composition in an amount of from 0.001 to 10 wt. %. Optionally, the surfactant is contained in an amount of from 0.01 to 5 wt. %, or from 0.05 to 2 wt. %, or from 0.1 to 1 wt. %.
- The surfactant, when present, is typically a nonionic surfactant. Typically, the nonionic surfactant is non-polymeric.
- Surfactants suitable for use in the present invention include fluorosurfactants (e.g. ethoxylated fluorosurfactants). Some specific examples of fluorosurfactants suitable for improving the film appearance of ink compositions according to the present invention are Zonyl® FSO and Zonyl® FSO-100.
- Other specific examples of surfactants suitable for improving the film appearance of ink compositions according to the present invention include Tego Wet® 450, Tegoglide® 410, Twin® 400, Tego Wet® 270 and Tegoglide® 482.
- Although ink compositions according to the present invention advantageously provide excellent print quality and jettability in the absence of polymer additives (especially acrylate polymers), certain polymers may improve the film appearance of the ink when printed. For example, vinyl polymers may improve the film appearance of the ink when printed on vinyl substrates. An example of a vinyl polymer additive is a high molecular weight copolymer of vinyl chloride and vinyl acetate (e.g. UCAR™ VYHH). Such polymer additives may be included in an amount of from 0.01 to 5 wt. %, or from 0.05 to 2 wt. %, or from 0.1 to 1 wt. %. However, it is usually preferred to provide ink compositions, which are completely free of any polymer additives.
- The solvent-based ink compositions according to the present invention are designed to be used with thermal inkjet printheads. There now follows a brief description of one of the Applicant's thermal inkjet printheads, as described in U.S. Pat. No. 7,303,930, the contents of which is herein incorporated by reference.
- Referring to
FIG. 1 , there is shown part of printhead comprising a plurality of nozzle assemblies.FIGS. 2 and 3 show one of these nozzle assemblies in side-section and cutaway perspective views. - Each nozzle assembly comprises a
nozzle chamber 24 formed by MEMS fabrication techniques on asilicon wafer substrate 2. Thenozzle chamber 24 is defined by aroof 21 andsidewalls 22 which extend from theroof 21 to thesilicon substrate 2. As shown inFIG. 1 , each roof is defined by part of anozzle plate 56, which spans across an ejection face of the printhead. Thenozzle plate 56 andsidewalls 22 are formed of the same material, which is deposited by PECVD over a sacrificial scaffold of photoresist during MEMS fabrication. Typically, thenozzle plate 56 andsidewalls 21 are formed of a ceramic material, such as silicon dioxide or silicon nitride. These hard materials have excellent properties for printhead robustness, and their inherently hydrophilic nature is advantageous for supplying ink to thenozzle chambers 24 by capillary action. - Returning to the details of the
nozzle chamber 24, it will be seen that anozzle opening 26 is defined in a roof of eachnozzle chamber 24. Eachnozzle opening 26 is generally elliptical and has an associatednozzle rim 25. The nozzle rim 25 assists with drop directionality during printing as well as reducing, at least to some extent, ink flooding from thenozzle opening 26. The actuator for ejecting ink from thenozzle chamber 24 is aheater element 29 positioned beneath thenozzle opening 26 and suspended across a pit 8. Current is supplied to theheater element 29 via electrodes 9 connected to drive circuitry in underlying CMOS layers of thesubstrate 2. When a current is passed through theheater element 29, it rapidly superheats surrounding ink to form a gas bubble, which forces ink through thenozzle opening 26. By suspending theheater element 29, it is completely immersed in ink when thenozzle chamber 24 is primed. This improves printhead efficiency, because less heat dissipates into theunderlying substrate 2 and more input energy is used to generate a bubble. - As seen most clearly in
FIG. 1 , the nozzles are arranged in rows and anink supply channel 27 extending longitudinally along the row supplies ink to each nozzle in the row. Theink supply channel 27 delivers ink to anink inlet passage 15 for each nozzle, which supplies ink from the side of thenozzle opening 26 via anink conduit 23 in thenozzle chamber 24. - The MEMS fabrication process for manufacturing such printheads was described in detail in U.S. Pat. No. 7,303,930, the contents of which are herein incorporated by reference.
- The operation of printheads having suspended heater elements is described in detail in the Applicant's U.S. Pat. No. 7,278,717, the contents of which are incorporated herein by reference.
- The Applicant has also described thermal bubble-forming inkjet printheads having embedded heater elements. Such printheads are described in, for example, U.S. Pat. No. 7,246,876 and US 2006/0250453, the contents of which are herein incorporated by reference.
- The Applicant's thermal inkjet printheads may be generally characterized by having one or more of the following features: (i) suspended heater element; (ii) heater element having a mass of less than 1 nanogram, optionally less than 500 picograms; (iii) actuation energy of less than 500 nJ, optionally less than 200 nJ; and (iv) titanium nitride or titanium aluminium nitride heater element.
- The solvent-based ink compositions of the present invention work optimally in combination with the Applicant's thermal inkjet printheads, as described above. However, their use is not limited to the Applicant's thermal printheads. The solvent-based ink compositions described herein may also be used in conventional thermal bubble-forming inkjet printheads, such as those sold commercially by Hewlett-Packard and Canon.
- In the case of conventional scanning thermal inkjet printheads (or, indeed, the Applicant's pagewidth printheads), the present invention may relate to an ink cartridge for a inkjet printer comprising any of the solvent-based ink compositions described above. The ink cartridge may optionally comprise a thermal inkjet printhead integrated with therewith.
- For the sake of completeness, printers incorporating the Applicant's thermal inkjet printheads are described in, for example, U.S. Pat. No. 7,201,468; U.S. Pat. No. 7,360,861; U.S. Pat. No. 7,380,910; and U.S. Pat. No. 7,357,496, the contents of each of which are herein incorporated by reference.
-
FIG. 4 shows aprint engine 103 for a thermal inkjet printer, as described in Applicant's U.S. application Ser. No. 12/062,514, the contents of which is herein incorporated by reference. Theprint engine 103 includes aremovable print cartridge 102, comprising a pagewidth printhead, and a bank of user-replaceable ink cartridges 128. Each color channel typically has itsown ink reservoir 128 and a corresponding pressure-regulatingchamber 106 for regulation of a hydrostatic pressure of ink supplied to the printhead. Hence, theprint engine 103 has fiveink reservoirs 128 and five corresponding pressure-regulatingchambers 106. Typical color channel configurations for this five-channel print engine 103 are CMYKK or CMYK(IR). Eachink cartridge 128 may comprise a solvent-based ink composition as described herein. Accordingly, the printer is suitable for printing onto non-porous (e.g. vinyl) substrates. - Although fluidic connections between the various components are not shown in
FIG. 4 , it will be appreciated that these connections are made with suitable hoses in accordance with the fluidics system described in, for example, U.S. application Ser. No. 12/062,514. - It will further be appreciated that, whilst ink compositions according to the present invention were designed for use in thermal inkjet printheads, they may also be useful in other types of inkjet printhead, such as the Applicant's bend-actuated inkjet printheads described in, for example, U.S. Pat. No. 7,416,280; U.S. Pat. No. 6,902,255; US 2008/0129793; and US 2008/0225082, the contents of which are herein incorporated by reference.
- Using an “open pool boiler” test apparatus, and after evaluating a wide range of solvents, the solvents described in Table A were shown to generate bubbles in a thermal inkjet device. (An “open pool boiler” test apparatus essentially comprises one or more inkjet nozzles as shown in
FIG. 2 without the roof structure 21). - Some physical characteristics of each solvent are also provided in Table A.
-
TABLE A Solvents generating bubbles in thermal inkjet test device Surface Evaporation Viscosity tension Solvent name Other name BPT (° C.) rate* (cP) (dynes/cm) MEK Methyl ethyl 80 4.03 0.43 24.18 ketone Dipropylene Di(propylene 187 0.02 3.44 28.25 glycol methyl glycol) methyl ether (DPM) ether, mixture of isomers Butyl DiGlycol 2-(2-Butoxy 245 0.001 3.6 30.5 Acetate ethoxy) ethy acetate Methoxy Propyl Propylene 145 0.33 1.2 28.2 Acetate glycol monomethyl ether acetate Cyclohexanone Cyclohexanone 155 0.3 2 34 Carbitol Acetate Di ethylene 219 0.008 2.67 31.4 glycol monoethyl ether acetate Hexyl acetate Hexyl acetate 170 0.208 0.9 27.3 N-Methyl-2 1-Methyl-2- 202 0.03 1.65 40.1 Pyrrolidone pyrrolidone Ethanol Ethyl alcohol 78 1.7 1.1 22.18 Water 100 0.36 0.9 72 (comparative) *relative to n-butyl acetate which has a value of 1. - Although all solvents listed in Table A generated bubbles in the test device, it was observed that the addition of ethanol to each solvent significantly improved bubble formation.
- A preferred solvent combination providing excellent bubble formation was N-methyl-2-pyrrolidine (NMP) and ethanol in a 1:1 ratio.
- Each of the solvents listed in Table A was tested for adhesion to a vinyl surface. Four large drops of solvent were placed on uncoated vinyl and left for 60 seconds under ambient conditions. The solvents were wiped gently with a tissue and any mark on the vinyl surface was noted.
- With the exception of water and ethanol, all solvents listed in Table A left a film impression on vinyl. The solvents are listed below in order of the severity with which a film impressions was left on the vinyl surface.
-
MEK>NMP>Cyclohexanone>>Hexyl acetate=Carbitol acetate=Butyldiglycol acetate=Methoxypropyl acetate>Dipropylene glycol methyl ether - In a further adhesion test, ink compositions were formulated consisting of a single solvent (from Table A) and a dye. Each ink composition consisted of: 97 wt. % solvent and 3 wt. % Bricosol red K10B (Solvent Red 8).
- The inks were applied as 6 micron wet films to the vinyl surface. Water rubs, adhesion and appearance were noted. In general, all ink compositions had a good film appearance on the vinyl surface before testing, with the exception of the carbitol acetate and hexylacetate compositions, which exhibited some minor irregularities.
- Water rubs were performed using cotton buds dipped in water, which were then rubbed across the films. The number of rubs needed to damage the film was noted or, if no damage observed, stopped at 100 rubs. All ink compositions showed excellent resistance to the water rub test, having no significant change after >100 water rubs. (Usually, a number of rubs>50 is considered to be excellent).
- Adhesion tests were made by using a razor blade to mark six vertical lines crossed by six horizontal lines in a grid (cross hatch). Scotch® tape was then placed over the grid and removed rapidly. The damage (if any) to the film was noted and a given an adhesion rating: 0 (poor)-5 (excellent). All ink compositions had an adhesion rating of 5.
- The drying time of each film at room temperature was also noted and the results are shown in Table B:
-
TABLE B Drying time of various single solvent ink compositions on vinyl Ink Composition Solvent Drying Time 1 cyclohexanone <10 s 2 dipropyleneglycol methyl ether >120 s 3 butyldiglycol acetate >120 s 4 methoxypropyl acetate 20 s 5 carbitol acetate >120 s 6 hexyl acetate <20 s 7 N-methyl pyrrolidinone <10 s - By way of comparison, a standard solvent-based piezo cyan ink was measured to have a drying time of >120 s under the same test conditions.
- In all ink compositions prepared, the water resistance and adhesion to vinyl were excellent, and performed at least as well as a piezo solvent-based standard.
- On the basis of bubble formation and film properties, an ink composition comprising NMP and ethanol in a 1:1 ratio was considered to be an excellent composition for thermal inkjets. However, all ink compositions comprising an adhesion-promoting solvent and ethanol were considered to be suitable for ejection using a thermal inkjet device and, indeed, showed good drop ejection characteristics from such a device.
- Several ink compositions were prepared using the preferred solvent system of NMP and ethanol, and additionally including a nonionic surfactant (Zonyl® FSO). These ink compositions are described in Table C.
-
TABLE C Ink compositions comprising NMP, ethanol, colorant and surfactant With Zonyl FSO SBOB1- SBOB1- SBOB1- SBOB1- Code Other name Function 17-1 Blue 17-2 Red 17-3 Yellow 17-4 Black N-Methyl-2 1-Methyl-2- Solvent 48.4 48.4 48.4 48.4 Pyrrolidone pyrrolidone Solvent 48.4 48.4 48.4 48.4 Ethanol Zonyl FSO Surfactant 0.2 0.2 0.2 0.2 Bricosol red K10B Solvent red 8 dye colourant 3 Bricosol blue K2GV Solvent blue 70 dye colourant 3 Bricosol yellow KRV Solvent yellow 82 dye colourant 3 Bricosol black NB Solvent black 27 dye colourant 3 Total 100 100 100 100 - Each ink composition was placed in a suitable ink reservoir and printed onto vinyl using a thermal inkjet printhead of the type described above, having suspended beam heater elements. All printouts had excellent film appearance, water resistance and adhesion to the vinyl surface.
- The addition of surfactant improved the film appearance of the ink on vinyl, compared to ink compositions in which the surfactant was absent.
- Other surfactants shown to have a beneficial effect in improving the film appearance of printouts on vinyl were Tego Wet® 450, Tegoglide® 410, Twin® 400, Tego Wet® 270 and Tegoglide® 482.
- Similarly, incorporation of a vinyl polymer into the ink composition showed some improvement in the film appearance of printouts. For example, the addition of UCAR™ VYHH (a high molecular weight copolymer of vinyl chloride and vinyl acetate) to the ink compositions improved the film appearance of printouts onto a vinyl substrate. However, polymer additives were not considered to be essential for acceptable film appearance on vinyl print media.
- A CMYK set of inks was prepared using pigment dispersions combined with hexyl acetate solvent. The ink compositions are described in Table D.
-
TABLE D Ink compositions comprising pigments Pigment content SB0B1- SB0B1- SB0B1- SB0B- Code Other name Function (dispersion) 23-1 23-2 23-3 1-23-4 Hexyl acetate Solvent 80 84.3 81 82 S JD-C254 pigment Pigment 16% 20 15:3 dispersion SJD R019 pigment Pigment 19% 15.7 V19 dispersion SJD-Y251 pigment Pigment 18% 18.75 Y151 dispersion SJD-BK17 pigment Pigment 17% 17.65 P K-7 dispersion Total 100 100 100 100 - In all four colors, adhesion to vinyl and water resistance were shown to be excellent. Furthermore, jettable ink compositions could be prepared using ink compositions according to the present invention and comprising pigment-based colorants.
- It will, of course, be appreciated that the present invention has been described by way of example only and that modifications of detail may be made within the scope of the invention, which is defined in the accompanying claims.
Claims (18)
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Publication number | Priority date | Publication date | Assignee | Title |
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US8376541B2 (en) | 2009-09-11 | 2013-02-19 | Zamtec Ltd | Method of ejecting solvent-based ink composition comprising pyrrolidinone solvent |
Citations (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4155767A (en) * | 1978-05-30 | 1979-05-22 | American Can Company | Jet ink compositions containing tetrahydrofuran solvent |
US4210566A (en) * | 1978-12-26 | 1980-07-01 | American Can Company | Jet ink compositions |
US4395287A (en) * | 1980-12-01 | 1983-07-26 | Canon Kabushiki Kaisha | Liquid recording material |
US5076843A (en) * | 1989-10-27 | 1991-12-31 | Lexmark, International, Inc. | Nonaqueous thermaljet ink compositions |
US5713988A (en) * | 1994-12-15 | 1998-02-03 | Cabot Corporation | Non-aqueous inks and coatings containing modified carbon products |
US6169129B1 (en) * | 1996-06-14 | 2001-01-02 | Cabot Corporation | Ink and coating compositions containing silicon-treated carbon black |
US6379444B1 (en) * | 1998-10-06 | 2002-04-30 | 3M Innovative Properties Company | Piezo inkjet inks and methods for making and using same |
US6444019B1 (en) * | 1998-11-06 | 2002-09-03 | Videojet Technologies Inc. | Ink jet ink composition |
US6869986B1 (en) * | 1999-07-30 | 2005-03-22 | Imaje S.A. | Ink composition for ink jet printing |
US7052537B2 (en) * | 2003-03-25 | 2006-05-30 | Hewlett-Packard Development Company, L.P. | Solvent systems for ink-jet inks |
US20060211791A1 (en) * | 2005-02-11 | 2006-09-21 | Burns Elizabeth G | Inkjet inks comprising modified pigments having attached polymeric groups |
US20070283848A1 (en) * | 2006-06-08 | 2007-12-13 | Samsung Electro-Mechanics Co., Ltd. | Metal ink composition for inkjet printing |
US20080006175A1 (en) * | 2006-07-07 | 2008-01-10 | Jetbest Corporation | Environmental-friendly and solvent-based inkjet ink composition |
US20080119593A1 (en) * | 2006-11-22 | 2008-05-22 | Rodney Stramel | Pigment-based non-aqueous ink-jet inks |
US20090246377A1 (en) * | 2008-03-31 | 2009-10-01 | Videojet Technologies Inc. | Thermal ink jet ink composition |
US7682435B2 (en) * | 2005-03-11 | 2010-03-23 | Hitachi Maxell, Ltd. | Oil-based pigmented ink composition |
US7789955B1 (en) * | 2006-04-20 | 2010-09-07 | Collins Ink Corporation | Inkjet ink composition |
US20100328401A1 (en) * | 2008-03-31 | 2010-12-30 | Videojet Technologies Inc. | Thermal ink jet ink composition |
US20110063370A1 (en) * | 2009-09-11 | 2011-03-17 | Silverbrook Research Pty Ltd. | Method of ejecting solvent-based ink composition comprising pyrrolidinone solvent |
US20110063373A1 (en) * | 2009-09-11 | 2011-03-17 | Silverbrook Research Pty Ltd | Method of ejecting solvent-based ink composition comprising ether solvent |
US20110064923A1 (en) * | 2009-09-11 | 2011-03-17 | Silverbrook Research Pty Ltd | Solvent-Based Inkjet Inks Comprising Surface-Modified Pigments |
US20110063372A1 (en) * | 2009-09-11 | 2011-03-17 | Silverbrook Research Pty Ltd | Method of ejecting solvent-based ink composition comprising acetate solvent |
US20110064919A1 (en) * | 2009-09-11 | 2011-03-17 | Siverbrook Research Pty Ltd | Solvent-based ink composition for thermal inkjets comprising pyrrolidinone solvent |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6645280B1 (en) | 2000-05-26 | 2003-11-11 | Videojet Technologies Inc. | Jet ink composition for printing watermarks |
ATE296863T1 (en) | 2000-07-19 | 2005-06-15 | Tetenal Ag & Co Kg | INK JET INK |
JP2002114929A (en) | 2000-10-04 | 2002-04-16 | General Kk | Ink composition for ink jet recording |
-
2009
- 2009-09-11 US US12/557,522 patent/US8110032B2/en active Active
Patent Citations (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4155767A (en) * | 1978-05-30 | 1979-05-22 | American Can Company | Jet ink compositions containing tetrahydrofuran solvent |
US4210566A (en) * | 1978-12-26 | 1980-07-01 | American Can Company | Jet ink compositions |
US4395287A (en) * | 1980-12-01 | 1983-07-26 | Canon Kabushiki Kaisha | Liquid recording material |
US5076843A (en) * | 1989-10-27 | 1991-12-31 | Lexmark, International, Inc. | Nonaqueous thermaljet ink compositions |
US5713988A (en) * | 1994-12-15 | 1998-02-03 | Cabot Corporation | Non-aqueous inks and coatings containing modified carbon products |
US6169129B1 (en) * | 1996-06-14 | 2001-01-02 | Cabot Corporation | Ink and coating compositions containing silicon-treated carbon black |
US6379444B1 (en) * | 1998-10-06 | 2002-04-30 | 3M Innovative Properties Company | Piezo inkjet inks and methods for making and using same |
US6444019B1 (en) * | 1998-11-06 | 2002-09-03 | Videojet Technologies Inc. | Ink jet ink composition |
US6869986B1 (en) * | 1999-07-30 | 2005-03-22 | Imaje S.A. | Ink composition for ink jet printing |
US7052537B2 (en) * | 2003-03-25 | 2006-05-30 | Hewlett-Packard Development Company, L.P. | Solvent systems for ink-jet inks |
US20060211791A1 (en) * | 2005-02-11 | 2006-09-21 | Burns Elizabeth G | Inkjet inks comprising modified pigments having attached polymeric groups |
US7682435B2 (en) * | 2005-03-11 | 2010-03-23 | Hitachi Maxell, Ltd. | Oil-based pigmented ink composition |
US7789955B1 (en) * | 2006-04-20 | 2010-09-07 | Collins Ink Corporation | Inkjet ink composition |
US20070283848A1 (en) * | 2006-06-08 | 2007-12-13 | Samsung Electro-Mechanics Co., Ltd. | Metal ink composition for inkjet printing |
US20080006175A1 (en) * | 2006-07-07 | 2008-01-10 | Jetbest Corporation | Environmental-friendly and solvent-based inkjet ink composition |
US20080119593A1 (en) * | 2006-11-22 | 2008-05-22 | Rodney Stramel | Pigment-based non-aqueous ink-jet inks |
US20090246377A1 (en) * | 2008-03-31 | 2009-10-01 | Videojet Technologies Inc. | Thermal ink jet ink composition |
US20100328401A1 (en) * | 2008-03-31 | 2010-12-30 | Videojet Technologies Inc. | Thermal ink jet ink composition |
US20110063370A1 (en) * | 2009-09-11 | 2011-03-17 | Silverbrook Research Pty Ltd. | Method of ejecting solvent-based ink composition comprising pyrrolidinone solvent |
US20110063373A1 (en) * | 2009-09-11 | 2011-03-17 | Silverbrook Research Pty Ltd | Method of ejecting solvent-based ink composition comprising ether solvent |
US20110064923A1 (en) * | 2009-09-11 | 2011-03-17 | Silverbrook Research Pty Ltd | Solvent-Based Inkjet Inks Comprising Surface-Modified Pigments |
US20110063372A1 (en) * | 2009-09-11 | 2011-03-17 | Silverbrook Research Pty Ltd | Method of ejecting solvent-based ink composition comprising acetate solvent |
US20110064919A1 (en) * | 2009-09-11 | 2011-03-17 | Siverbrook Research Pty Ltd | Solvent-based ink composition for thermal inkjets comprising pyrrolidinone solvent |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8376541B2 (en) | 2009-09-11 | 2013-02-19 | Zamtec Ltd | Method of ejecting solvent-based ink composition comprising pyrrolidinone solvent |
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